Problems with the writing a new email or replying to one including using the autocomplete feature. Generally, problems found are within the compose window before sending a message. A few examples: 1. User interface and functionality problems with the html compose window and the plain text compose
window. 2. Problems with addressing a mail message or adding an attachment.

Backend support for services is already available, but the frontend only exists
in Camino. We need to add it both to Firebird (browser) and Thunderbird (mail).
*** This bug has been marked as a duplicate of 135268 ***